同步电机转子绕组接地监测灵敏度的仿真研究

对电阻平衡电桥接地监测的原理进行了详尽地论述,利用Matlab 6.5/Simulink 5.0的强大功能,对其进行灵敏度仿真分析,仿真结果与理论分析相吻合.     

The Yarn Curve and Tension in Rotor Spinning

The effective way of finding the yarn curve shape and tension of OE（open end） yarn inside the rotor is carried out and treated by dividing the yarn curve into two parts, from which the trajectory of the yarn sliding on the navel surface is also obtained. It is pointed out that the yarn curve shape and tension will both fluctuate with the trajectory＇s revolving cycle inside the rotor. However, the fluctuation is not too great, so the motion can still be regarded as approximately steady for dynamic analysis.     

Study on seal improvement and rotor thrust control of centrifugal compressor

Fluid pressure variations due to process fluctuations or balance drum seal degradation can result in rotor thrust increasing that may jeopardize thrust bearing and compressor’s reliability. Also, the leakage flow through balance drum seal can seriously affect the efficiency of compressor. A method that can improve both the efficiency and reliability of centrifugal compressor is presented. The method focused on rotor thrust control and balance drum seal upgrading. The low leakage feature of Dry-Gas-Seal（DGS）, high reliability of labyrinth, and the feasibility of upgrading existing structure are taken into account at the same time to design a combined labyrinth-dry gas seal system on the balancing drum. Based on the combined seal system, a Fault Self-Recovering（FSR） system for the fault of rotor shaft displacement is introduced to assure the safety and reliability of centrifugal compressor. The modern Computational Fluid Dynamics（CFD） is used to validate this envision. The numerical result and relevant information indicate that the combined sealing system could improve the efficiency of the centrifugal compressor by about 4%.     

多项式拟合的通用QBASIC程序及其在气相色谱分析中的应用

按照多项式拟合的数学方法，提供了QBASIC语言编写的通用求解程序，给出了程序设计思想和主要模块的流程图．举例说明程序在气相色谱分析中对转子流量计校正的应用．     

一种基于积分式原理的转子位置检测器

针对感应电动机串级调速系统转子位置检测器存在的缺点，提出了基于近似积分原理工作的转子位置检测器的工作原理，其幅值系数、附加相角变化小，实验效果及工业运行实验结论可靠。     

可变阻抗滑动轴承的动态特性及其对转子不平衡响应的影响

讨论了可变阻抗滑动轴承的工作原理、理论模型及其油膜动力学系数的计算方法，并分析了由可变阻抗滑动轴承支承的转子不平衡响应，结果表明这种轴承有可在机器运行条件下有效地改变系统临界速度和不平衡响应幅值等动力学特性，从而达到控制机器动力学性能的目的     

绕线式异步电动机起动电阻计算方法探析

以绕线式异步电动机的实用特性为基础，分析了传统起动电阻计算方法的不足之外，并给出一种更准确的转子电路串接起动电阻的计算方法     

矢量控制系统中转子电阻辨识方案的仿真研究

设计了一种基于自适应磁链观测器的无速度传感器感应电机矢量控制系统,给出了转速和转子电阻的辨识率,保证了系统在全速度范围内能够稳定运行。通过仿真和实验,对转子电阻随温度的变化对无速度传感器控制系统的影响进行了模拟研究。研究结果表明:给出的转子电阻的辨识方案具有更快的收敛速度;转子电阻的辨识对电机的速度辨识具有很好的修正作用。     

绕线式异步机的转子阻抗参数对转子整流器整流的影响

分析绕线式异步电动机的转子阻抗参数对转子整流器输出电压和转子电流波形的影响，给出了换流重叠角、换流压降和输出电压的计算公式。     

一种悬浮转子电动机的设计

介绍了一种悬浮转子电动机的专利设计,该设计包括设置在转轴上的转子和设置在所述转轴两端用于枢接所述转轴的环形支座,所述转轴两端的周向上均匀设置有至少两个扇形凸台,所述凸台在所述转轴的径向上开有通气腔体,所述通气腔体由一泵气装置提供气压,设计的电动机利用凸台内的通气腔体内的高于大气压的气体,使所述凸台脱离所述环形支座,使转轴类似气垫船悬浮起来,使电动机不使用润滑剂,解决磨损的问题和润滑剂劣化的问题.